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Cryptosporidium hominisgene catalog: a resource for the selection of novelCryptosporidiumvaccine candidates
- Source :
- Database: The Journal of Biological Databases and Curation
- Publication Year :
- 2016
- Publisher :
- Oxford University Press (OUP), 2016.
-
Abstract
- Human cryptosporidiosis, caused primarily by Cryptosporidium hominis and a subset of Cryptosporidium parvum, is a major cause of moderate-to-severe diarrhea in children under 5 years of age in developing countries and can lead to nutritional stunting and death. Cryptosporidiosis is particularly severe and potentially lethal in immunocompromised hosts. Biological and technical challenges have impeded traditional vaccinology approaches to identify novel targets for the development of vaccines against C. hominis, the predominant species associated with human disease. We deemed that the existence of genomic resources for multiple species in the genus, including a much-improved genome assembly and annotation for C. hominis, makes a reverse vaccinology approach feasible. To this end, we sought to generate a searchable online resource, termed C. hominis gene catalog, which registers all C. hominis genes and their properties relevant for the identification and prioritization of candidate vaccine antigens, including physical attributes, properties related to antigenic potential and expression data. Using bioinformatic approaches, we identified ∼400 C. hominis genes containing properties typical of surface-exposed antigens, such as predicted glycosylphosphatidylinositol (GPI)-anchor motifs, multiple transmembrane motifs and/or signal peptides targeting the encoded protein to the secretory pathway. This set can be narrowed further, e.g. by focusing on potential GPI-anchored proteins lacking homologs in the human genome, but with homologs in the other Cryptosporidium species for which genomic data are available, and with low amino acid polymorphism. Additional selection criteria related to recombinant expression and purification include minimizing predicted post-translation modifications and potential disulfide bonds. Forty proteins satisfying these criteria were selected from 3745 proteins in the updated C. hominis annotation. The immunogenic potential of a few of these is currently being tested.Database URL: http://cryptogc.igs.umaryland.edu.
- Subjects :
- Protozoan Vaccines
0301 basic medicine
Signal peptide
030106 microbiology
Cryptosporidiosis
Cryptosporidium
Antigens, Protozoan
Genome
General Biochemistry, Genetics and Molecular Biology
03 medical and health sciences
Databases, Genetic
Animals
Humans
Gene
Genetics
biology
Reverse vaccinology
biology.organism_classification
3. Good health
030104 developmental biology
Cryptosporidium parvum
Original Article
Human genome
General Agricultural and Biological Sciences
Genome, Protozoan
Cryptosporidium hominis
Information Systems
Subjects
Details
- ISSN :
- 17580463
- Volume :
- 2016
- Database :
- OpenAIRE
- Journal :
- Database
- Accession number :
- edsair.doi.dedup.....abeaf51e3befc1c68086b9ab72126d6e